Fetch all Astra customizer controls

functions.php

<?php

add_filter( 'astra_customizer_configurations', 'register_configuration', 999, 2 );

function register_configuration( $configurations, $wp_customize ) {
	
	$arr = array();

	foreach ($configurations as $key => $value) {

		if( isset( $value['parent'] ) ) {

			$value['parent'] = str_replace( "astra-settings[", "", $value['parent']);
			$value['parent'] = str_replace( "]", "" , $value['parent'] );

			if( array_key_exists( $value['parent'], $arr ) ) {
				if( is_array( $arr[$value['parent']] ) ) {
					$arr[ $value['parent'] ] = array_merge( array ( $value['name'] ), $arr[$value['parent']] );
				} else {
					$arr[ $value['parent'] ] = array_merge( array ( $value['name'] ), array ( $arr[$value['parent']] ) );
				}
			} else {
				$arr[ $value['parent'] ] = $value['name'];
			}


		}
	}
	echo "<pre>";			
	print_r( json_encode( $arr ) );
	echo "</pre>";

	return $configurations;
}

?>